French députés' offices will be equipped with a Linux operating system and open source productivity software. There will be 1154 French parliamentary workstations running on an open source OS, with OpenOffice.org, Firefox and an open source email client.

OK in linux most of shared libraries that you must install for a given application will never be used for another application

Name one !
It's good to see only lies can help you make your point.
Which of libpng, zlib, openssl, nss, ... will never be used by another app ?
How can you even be sure of that, are you psychic ?
I've yet to find one library that you MUST install that is used by one app only.

so to install 10 applications you will need to install 100 shared libraries that almost all will never be shared because there is no app other than that you installed will use it!

You don't even know what a shared library is, do you ?
You never need to install 100 or even 10 shared libraries for one application.
Just show me one of these apps please.
Note well : Everything is compiled from source on my Linux OS, so if what you say was true, I would be the first to know. But to me, it's pretty obvious you're a clueless lier.

And by the way dependancy hell in windows is unnoticable to customers, but in linux dependacies are deterrent to the platform, and need to be addressed soon

Riiiiight. Like when codec packages urge you to desinstall any other, that's because they fear faeries ? Yes, that's the most prominent case of dependancy hell, that can make your video work one day (when you just installed the software without rebooting), and when you reboot Windows, it doesn't work anymore.
It's always clueless people like you that dare say such nonsense.
FYI, Linux library dependancies work extremely well, and are already addressed. The dependancies problems people have are only in the package systems, that try to prevent the user from destroying their system.

Never, it's Redhat Enterprise Linux without redhat logos, besides these horrible things will show up even more with some other weak distros

Yes, CentOS is not broken. As you're clueless, you thought that the fact that swap was taken (15 % here) meant you actually used it every time (referred to as thrashing) and so, you thought your lie that the system was going to a crawl would fly.

It's amazing to be so clueless as you are, really !
Compilation (especially C++ with GCC) and image processing are one of the most memory intensive tasks !
Actually, the kdebindings package compilation (with final options) was one of the only compilation capable of making my main computer go to a crawl, by taking all my memory + swap (1 GB + 2GB).

You have to try P2P networking with Gigabytes of files sharable or better try java based applications like Azureus and see the results

You using memory leak full apps like Azureus doesn't mean Linux apps use lots of memory, that just means they are buggy software.
My wife use (k)mldonkey with gigabytes of files shareable, and we never got a problem.

or open 20 tabs on firefox with heavy graphics and flash aniamtions; add to that a movie that you would like to watch with xine based player

And just the same, I'd never use Firefox on my Linux desktop (except when forced to). We use Galeon or EPiphany with far more tabs combined than you have (but not with heavy graphics and flash anims on each, except for ads), constantly open, and never had any problem launching (k)mplayer.
So please, keep your anecdotical bizarre evidences to yourself, they don't mean anything, especially as to Linux apps memory usage.
If you didn't realise by now that your heavy graphics and flash animations are the memory takers, you're a lost soul.